. Revised and enlarged ed. of the science of railways . ^ the travel of the piston. If the piston could travel far enough to causethe cylinder to be equal in capacity to the auxil-iary reservoir, then their equalized pressurewould be just one-half what the pressure was inthe auxiliary reservoir before the triple valve FfG. 3^/it(£ Crt/NOEfi opened communication to the cylinder. As shows, the brake piston can travel but 12inches, while the auxiliary reservoir has a capac-ity equivalent to about 24 inches of the length ofthe cylinder. Thus with a full piston travel of12 inches the auxi
. Revised and enlarged ed. of the science of railways . ^ the travel of the piston. If the piston could travel far enough to causethe cylinder to be equal in capacity to the auxil-iary reservoir, then their equalized pressurewould be just one-half what the pressure was inthe auxiliary reservoir before the triple valve FfG. 3^/it(£ Crt/NOEfi opened communication to the cylinder. As shows, the brake piston can travel but 12inches, while the auxiliary reservoir has a capac-ity equivalent to about 24 inches of the length ofthe cylinder. Thus with a full piston travel of12 inches the auxiliary reservoir is twice the sizeof the cylinder; with an 8-inch piston travel,it is three times as large; with a 6-inch travel,it is four times as large, etc. Hence theirequalizing points are respectively at two-thirds,three-fourths, and four-fifths the pressure the 358 fo- RAIL^VAY EQUIPMENT, FIG. P. V 5 ^ PflTIO 0F/1u/II//IRY ff£S£/{yO/R (/I) TO Cn/NDER(C)/sZ £5£Mr/NG lo/^G£6T P/STOA^ T/f/fl^£L /£/AC/V£J. auxiliary reservoir has before the brake is ap-plied, as will be shown. Figs. P, Q and R show reservoirs in whichwater is used to illustrate the effect of the differ-ent piston travels just given. In Fig. P theauxiliary reservoir {A) is twice as large as the FIG. Q. ^si c^ ^ 60 IN. -
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Keywords: ., bookcentury1800, bookdecade1800, bookidsciencerailw, bookyear1800
